Yes; the post was referring to places listed on the McIntosh service website as McIntosh authorized. Only one in the SF Bay Area and 2 more in the Sacramento area.
Do you recommend any of these for OP's repair? I've had some nice speaker repair work done by Sertech but not sure they're the best for this project.
Based on what the website says (I have no experience with them), Ben's Audio looks perfect for this project as they say they restore, do preventive maintenance, repair and even modify. Most local shops will only repair to factory spec. I see they are new, founded in 2022. Their list of what they service shows only electronics, and so not (I guess) tape decks, CD players, or speakers.
I really hope they're as good as the website looks and that they last for awhile.